Universal container sales reps can modify fields on an opportunity until it is closed. only the sales operations team can modify the post close follow up date and post close followup comments fields. what's the best way to make this occur?
a. use field-level security on page layouts to restrict editing fieldsb. use field-level security to mark fields as read=only on the sales profilec. use record types with field sets and restrict editing fields using field-level securityd. use multiple record types, page layouts, and profiles

How would you cite different books by the same author on the works cited page? moore, jack h. folk songs and ballads. salem: poetry press, 1999. print. moore, jack h. ballads in poetry – a critical review. dallas: garden books, 1962. print. moore, jack h. folk songs and ballads. salem: poetry press, 1999. print. –––. ballads in poetry – a critical review. dallas: garden books, 1962. print. moore, jack h. ballads in poetry – a critical review. dallas: garden books, 1962. print. moore, jack h. folk songs and ballads. salem: poetry press, 1999. print. moore, jack h. ballads in poetry – a critical review. dallas: garden books, 1962. print. –––. folk songs and ballads. salem: poetry press, 1999. print.